Anonymous Domain Ownership

Emerging identity systems in the Web 3.0 achieve a new notion of digital ownership and control. Yet, existing identity ecosystems face bootstrapping issues as trustworthy authorities cannot be represented with adequate privacy. To equip authorities with trustworthy attributes, this work introduces a protocol of domain ownership oracles, where domain owners can prove domain ownership to any third party while remaining anonymous. To prove ownership of an anonymous domain example. com, users convince verifiers of t he f acts that (i) example.com is in control of users and that (ii) example.com belongs to a public anonymity set of domains. Verifiers learn nothing beyond these two facts and cannot determine which user owns which domain. For the first time, o ur work proposes a practical system to attribute anonymous domain owners with credentials of domain ownership where the degree of anonymity depends on the size of a public anonymity set of domains.